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16
2.11 – COM2 Header (J23)
1 9
2 10
Signal
Description
Pin#
Pin#
Signal
Description
NC/KEY
10
9
GND
(Ground)
RI (Ring-
Indicator)
8
7
DTR (Data-
Terminal -
Ready)
CTS (Clear-
to-Send)
6
5
TX
(Transfer-
Data)
RTS
(Request-
to-Send)
4
3
RX
(Receive -
Data)
CPU1 DIMM3
CPU1 DIMM2
CPU1 DIMM1
CPU1 DIMM4
CPU2
CPU2 DIMM2
CPU2 DIMM3
CPU2 DIMM4
CPU2 DIMM1
CPU1
DSR (Data-
Set-Ready)
2
1
DCD
(Data
Carrier
Detect)
2.12 – PCI-X Bridge B (PCI 1 & PCI 2) PCI-X Speed Select Jumper (J24 / J39)
Speed
1
1
133MHz
J24 / J39
100MHz
J39
J24
66MHz
J24 / J39
CPU1 DIMM3
CPU1 DIMM2
CPU1 DIMM1
CPU1 DIMM4
CPU2
CPU2 DIMM2
CPU2 DIMM3
CPU2 DIMM4
CPU2 DIMM1
CPU1
Allows PCI-X Bridge B to operate at up
to 133MHz (For use with one PCI-X
133 device)
Tyan recommends using PCI-X Slot
1 for 133MHz support
